12 letters
- percipiently25
- percolations20
- percussively26
- percutaneous21
- plerocercoid23
- porcelainize29
- porcelaneous21
- postexercise25
- prepurchased25
- prepurchases24
- recirculated21
- recirculates20
- repercussion20
- repercussive23
- repurchasing24
- researchable21
- researchists17
- sarcomatoses18
- sarcomatosis18
- sarcoplasmic25
- scarcenesses19
- searchlights22
- semicircular23
- squirarchies27
- subantarctic23
- sugarcoating21
- supercabinet23
- supercargoes21
- supercarrier19
- supercenters20
- supercharged24
- supercharger23
- supercharges23
- superciliary22
- supercilious21
- superclasses20
- supercluster21
- supercoiling23
- superconduct25
- supercooling23
- supercurrent21
- symposiarchs25
- tercentenary19
- thunderclaps24
- thundercloud23
- torchbearers20
- transpierced20
- transpierces19
- trierarchies17
- trifurcating22
- trifurcation20
- tuberculated22
- tuberculoses21
- tuberculosis21
- uncirculated23
- uncoercively27
- uncommercial27
- undercharged23
- undercharges22
- underclasses19
- underclothes21
- undercoating21
- undercooling22
- undercounted21
- undercurrent20
- undercutting22
- unmercifully28
- unperceptive27
- unreinforced22
- unsearchable23
- unsearchably25
- uppercutting26
- watercoolers19
- watercourses19
- watercresses18
- weathercasts20
- weathercocks27